Factors regulating carbohydrate and lipid metabolism isolated from the corpus cardiacum of the Eastern lubber grasshopper,Romalea microptera

✍ Scribed by Spring, Jeffrey H. ;Gäde, Gerd

• Publisher: John Wiley and Sons
• Year: 1987
• Tongue: English
• Weight: 825 KB
• Volume: 241
• Category: Article
• ISSN: 0022-104X
• DOI: 10.1002/jez.1402410106

✦ Synopsis

Romalea microptera corpus cardiacum (RCC) contains large quantities of peptide material that is capable of eliciting strong hyperlipemic (maximum increase, 26 mg/ml; locusts) and hypertrehalosemic (maximum increase, 27 mg/ml; cockroaches) responses in test species. Calculations indicate that RCC contain more than a n order of magnitude more bioactive material than either Locusta or Periplaneta corpus cardiacum. R. microptera itself shows no response to injections of synthetic locust adipokinetic hormone I (AKH I) at doses of up to 100 pmol, although injection of RCC at high concentrations (up to 1.0 gland-equivalents) causes moderate hyperlipemia (maximum increase, 3 mg/ml). Starved R. microptera do not exhibit the metabolic hyperlipemia observed in starved L migratoria, but starvation does block the RCC-stimulated hyperlipemia. Neither fed nor starved R. microptera show a